et

s

2 [sekund] symbol

Terminological databases

Metroloogia terminibaas

ID 572525 Last modified 27.09.2026
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Domain metrologyunits of measurement
  • sekund on määratud sõltuvalt tseesiumi sageduse ∆νCs, milleks on tseesiumi aatomi isotoobi 133 kahe häirimata põhiseisundi struktuurinivoo vahelisele siirdele/üleminekule vastav sagedus, fikseerimisega väärtusarvul 9 192 631 770 väljendatud ühiku Hz abil, mis on võrdne ühikuga s–1
    Good to know
    • Sekund, tähis s, on SI ajaühik, ühtlasi ka SI põhiühik.
  • the second defined by taking the fixed numerical value of the caesium frequency ∆νCs, the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s–1
    Good to know
    • The second, symbol s, is the SI unit of time, and the unit of proper time in the sense of the general theory of relativity, and the base unit of the SI.
sekund
Usage examples
  • Sekund on ajaühik, mis tavaliselt tuletatakse ööpäeva jagamisest esmalt 24 tunniks, seejärel 60 minutiks ja lõpuks 60 sekundiks, kokku 24 × 60 × 60 = 86400 sekundit ööpäevas.
Good to know
  • Põhiühik sekund on defineeritud SI Brošüüris, mis on publitseeritud BIPM-i poolt.
s symbol
second
Usage examples
  • The second is a unit of time derived from the division of the day, first into 24 hours, then into 60 minutes, and lastly into 60 seconds, for a total of 24 × 60 × 60 = 86400 seconds per day.
Good to know
  • The second is defined by the SI Brochure, which is published by the BIPM.
s symbol

Word forms

Inflection Type 2e

s s-d
s s-te
s-t s-id

Etymology not available

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Phrases and phrasal verbs not available

Compounds with search word as second component not available

Compounds with search word as first component not available

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